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Finding the Fourth Proportional to 641.13, 961.88 and 230.25

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Solution

The fourth proportional to 641.13, 961.88 and 230.25 is: 345.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.13 : 961.88 = 230.25 : x
  2. Step 2: Convert to fraction form
    641.13/961.88 = 230.25/x
  3. Step 3: Cross multiply
    641.13x = 961.88 × 230.25
  4. Step 4: Simplify right side
    641.13x = 221,471.72
  5. Step 5: Solve for x
    x = 221,471.72/641.13
  6. Step 6: Final answer
    x = 345.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.